From: Liu Han <liuhan@espressif.com>
Date: Thu, 27 Apr 2017 10:59:47 +0000 (+0800)
Subject: fix(lwip): fix tcp connect fail when enable LOOPIF
X-Git-Tag: v2.1-rc1~136^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=aeecbcc7ee64c56d031ecefd6777d6afa5737a4b;p=esp-idf

fix(lwip): fix tcp connect fail when enable LOOPIF
---

diff --git a/components/lwip/core/ipv4/ip4.c b/components/lwip/core/ipv4/ip4.c
index 1d581d4d85..3877e20609 100755
--- a/components/lwip/core/ipv4/ip4.c
+++ b/components/lwip/core/ipv4/ip4.c
@@ -147,6 +147,9 @@ ip4_route(const ip4_addr_t *dest)
 {
 #if ESP_LWIP
   struct netif *non_default_netif = NULL;
+#if LWIP_HAVE_LOOPIF
+  struct netif *loop_default_netif = netif_find("lo0");
+#endif
 #endif
   struct netif *netif;
 
@@ -173,7 +176,11 @@ ip4_route(const ip4_addr_t *dest)
       }
 
       if (netif != netif_default){
+#if LWIP_HAVE_LOOPIF
+          non_default_netif = (netif == loop_default_netif) ? NULL : netif;
+#else
           non_default_netif = netif;
+#endif
       }
     }
   }